CN115242318B - Data transmission device, electronic equipment, filtering control method and control device - Google Patents
Data transmission device, electronic equipment, filtering control method and control device Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B15/00—Suppression or limitation of noise or interference
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Abstract
The application discloses a data transmission device, electronic equipment, a filtering control method and a control device, and belongs to the technical field of electronic equipment. Wherein, data transmission device includes: the device comprises a signal source, a signal processing module, a filtering module, a first transmission wire harness, a second transmission wire harness and a detection wire harness; the signal source is connected with a first input end of the filtering module through a first transmission wire harness; the signal source is connected with the second input end of the filtering module through the detection wire harness; the output end of the filtering module is connected with the signal processing module through a second transmission wire harness; the filtering module performs filtering processing on a second noise signal in the first transmission line bundle according to the first noise signal in the detection line bundle.
Description
Technical Field
The application belongs to the technical field of electronic equipment, and particularly relates to a data transmission device, electronic equipment, a filtering control method and a control device.
Background
In related art, in electronic devices such as smartphones, the mobile industry processor interface (Mobile Industry Processor Interface, MIPI) alliance has proposed various high-speed communication standard interfaces, and these standard structures perform data transmission through a high-speed communication harness.
These high-speed harnesses have the characteristics of low voltage and high data transmission rate, but have the defect of poor anti-interference capability, and when the intelligent terminal uses strong radiation communication functions such as near field communication (Near Field Communication, NFC) or global system for mobile communication (Global System for Mobile Communications, GSM), the high-speed harnesses may not work.
Disclosure of Invention
The application aims to provide a data transmission device, electronic equipment, a filtering control method and a control device, which can solve the problem of poor anti-interference capability of a high-speed communication wire harness in the related technology.
In a first aspect, an embodiment of the present application proposes a data transmission device, including:
the device comprises a signal source, a signal processing module, a filtering module, a first transmission wire harness, a second transmission wire harness and a detection wire harness; the signal source is connected with a first input end of the filtering module through a first transmission wire harness;
the signal source is connected with the second input end of the filtering module through the detection wire harness;
the output end of the filtering module is connected with the signal processing module through a second transmission wire harness;
the filtering module performs filtering processing on a second noise signal in the first transmission line bundle according to the first noise signal in the detection line bundle.
In a second aspect, an embodiment of the present application proposes an electronic device, including:
the data transmission device according to the first aspect, wherein the signal source is an image acquisition module, and the signal processing module is a processor.
In a third aspect, the present application provides a filtering control method for controlling an electronic device as set forth in the second aspect, the data transmission device includes a first switch assembly and a second switch assembly, and the filtering control method includes:
acquiring a first noise signal in a detection wire harness;
and controlling the first switch component and the second switch component to change the switch state according to the comparison result of the first noise signal and the first threshold value so as to carry out filtering processing on the second noise signal in the first transmission wire harness.
In a fourth aspect, the present application provides a filtering control device for controlling an electronic apparatus as set forth in the second aspect, the data transmission device including a first switch assembly and a second switch assembly, the filtering control device including:
the acquisition module is used for acquiring a first noise signal in the detection wire harness;
and the control module is used for controlling the first switch component and the second switch component to change the switch state according to the comparison result of the first noise signal and the first threshold value so as to carry out filtering processing on the second noise signal in the first transmission wire harness.
In a fifth aspect, embodiments of the present application provide a readable storage medium, on which a program or instructions are stored, which when executed by a processor, implement the steps of the filtering control method as in the third aspect.
In this application embodiment, data transmission device specifically includes the pencil such as C-PHY standard, in data transmission device, set up and be used for transmitting the transmission pencil of signal and set up detection pencil and filter module side by side, because can not transmit normal communication signal in the detection pencil, consequently, the signal that detects in the detection pencil is noise signal, and because detection pencil and transmission pencil set up side by side, consequently, the noise signal that environmental radiation produced in detection pencil and transmission pencil is the same, through filter module, noise signal based on in the detection pencil filters in the transmission pencil, noise interference in the data transmission device is reduced that can be accurate, improve the interference killing feature of this kind of high-speed pencil, when guaranteeing electronic equipment and starting strong radiation communication function, data transmission device's operational reliability.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, wherein:
fig. 1 shows one of schematic structural diagrams of a data transmission device according to an embodiment of the present application;
FIG. 2 shows a second schematic diagram of a data transmission device according to an embodiment of the present application;
FIG. 3 is a third schematic diagram of a data transmission device according to an embodiment of the present application;
fig. 4 shows a fourth schematic structural diagram of a data transmission device according to an embodiment of the present application;
FIG. 5 shows a block diagram of an electronic device according to an embodiment of the present application;
FIG. 6 shows a flowchart of a filter control method according to an embodiment of the present application;
fig. 7 shows a block diagram of a filter control device according to an embodiment of the present application.
Reference numerals:
100 data transmission device, 102 transmission wire harness, 1022 first wire core, 1024 second wire core, 1026 third wire core, 104 signal source, 106 signal processing module, 108 filter module, 110 detection wire harness, 1102 fourth wire core, 1104 fifth wire core, 1106 sixth wire core, 112 first resistor, 114 second resistor, 116 comparator, 1162 first comparator, 1164 second comparator, 1166 third comparator, 118 first switch component, 1182 first switch component, 1184 second switch component, 120 second switch component, 1202 third switch component, 1204 fourth switch component, 1206 fifth switch component, 122 controller, 124 conjugate filter.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functionality throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
The features of the terms "first", "second", and the like in the description and in the claims of this application may be used for descriptive or implicit inclusion of one or more such features. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
A data transmission apparatus, an electronic device, a filtering control method, and a control apparatus according to an embodiment of the present application are described below with reference to fig. 1 to 7.
In some embodiments of the present application, a data transmission device is provided, fig. 1 shows one of schematic structural diagrams of the data transmission device according to an embodiment of the present application, and as shown in fig. 1, the data transmission device 100 includes:
a signal source 104, a signal processing module 106, a filtering module 108, a first transmission harness 102, a second transmission harness, and a detection harness 110; the signal source 104 is connected to a first input of the filtering module 108 via the first transmission harness 102;
the signal source 104 is connected to a second input of the filtering module 108 via a detection harness 110;
the output end of the filtering module 108 is connected with the signal processing module 106 through a second transmission wire harness;
the filtering module 108 performs filtering processing on the second noise signal in the first transmission line bundle 102 according to the first noise signal in the detection line bundle.
In the embodiment of the application, the data transmission device 100 is a high-speed data transmission line conforming to the MIPI alliance standard, such as a C-PHY harness, and the data transmission device 100 has the characteristics of high signal transmission efficiency, low power consumption, small number of required interfaces, and the like, and is widely applied to electronic devices such as smart phones.
To solve the problem of poor anti-interference capability of a high-speed wire harness such as a C-PHY wire harness, the application sets a filtering module 108 and a detection wire harness 110 in the data transmission device 100, where the detection wire harness 110 is a wire harness that is set side by side with the transmission wire harness 102, specifically, taking the data transmission device 100 as an example, the detection wire harness 110 and the transmission wire harness 102 are set in a protection layer according to the same extending direction, and the number of wire cores, the wire core diameter and the wire core length of the detection wire harness 110 can be the same as those of the transmission wire harness 102.
Therefore, the detection harness 110 corresponds to an additional harness provided in the data transmission device 100, and the harness is not connected to the signal source 104 and the signal processing module 106, that is, when no interference factors such as radiation or magnetic field exist in the environment, no signal exists in the detection harness 110.
When there is an interference factor in the environment, the detection harness 110 and the transmission harness 102 are arranged side by side, so that the noise signal sources 104 such as radiation or magnetic field form an almost identical interference signal in the detection harness 110 and the transmission harness 102, where the noise signal formed by the environmental noise signal source 104 in the detection harness 110 is denoted as a first noise signal, and the noise signal formed by the environmental noise signal source 104 in the transmission harness 102 is denoted as a second noise signal.
The filtering module 108 is connected to the transmission line bundle 102 and the detection line bundle 110 at the same time, and when the filtering module 108 detects the first noise signal in the detection line bundle 110, it can be determined that similar noise signals exist in the transmission line bundle 102, so that the second noise signal in the transmission line bundle 102 can be effectively filtered based on the signal value of the first noise signal.
According to the embodiment of the application, the detection wire harness 110 and the filtering module 108 which are arranged side by side with the transmission wire harness 102 for transmitting signals are arranged, noise signals in the transmission wire harness 102 are filtered based on the noise signals in the detection wire harness 110, noise interference in the data transmission device 100 can be accurately reduced, the anti-interference capability of the high-speed wire harness is improved, and the working reliability of the data transmission device 100 when the electronic equipment is started with a strong radiation communication function is ensured.
In some embodiments of the present application,
the detection harness 110 further includes:
the first end of the first resistor 112 is connected with the first end of the detection wire harness 110, and the second end of the first resistor 112 is grounded;
the first end of the second resistor 114 is connected to the second end of the detection wire harness 110, and the second end of the second resistor 114 is grounded.
In this embodiment of the present application, the two ends of the detection wire harness 110 are respectively provided with the first resistor 112 and the second resistor 114, specifically, in order to accurately simulate the working state of the transmission wire harness 102, the first resistor 112 is specifically a resistor of the analog signal source 104, and the second resistor 114 is specifically a resistor of the analog signal processing module 106, so that the working condition from the C-PHY output source, that is, the signal source 104, to the hardware processing circuit, that is, the signal processing module 106 is simulated, and the first noise signal on the detection wire harness 110 can accurately feed back the external interference received by the normal communication signal in the line transmission process, thereby improving the accuracy of interference detection.
In some embodiments of the present application, as shown in fig. 1, the filtering module 108 includes: the first input end of the comparator 116 is the first input end of the filter module 108, the second input end of the comparator 116 is the second input end of the filter module 108, and the output end of the comparator 116 is the output end of the filter module 108.
In the present embodiment, the filtering module 108 implements filtering by the situation of the comparator 116. Specifically, the comparator 116 may be a high-speed analog comparator 116, where the positive input of the comparator 116 is a normal C-PHY signal in the transmission harness 102. The negative input of comparator 116 is the first noise signal on the detection harness 110.
Because the detection harness 110 is disposed side by side with the transmission harness 102, the noise signal source 104, such as radiation or magnetic field, may form nearly identical interference signals in the detection harness 110 and the transmission harness 102. Therefore, the comparator 116 can filter the interfering second noise signal from the signal of the transmission line bundle 102 by subtracting the normal C-PHY signal from the first noise signal, so that the C-PHY signal in the transmission line bundle 102 has better signal quality, and the reliability and the anti-interference capability of the data transmission device 100 are improved.
In some embodiments of the present application, fig. 2 shows a second schematic structural diagram of a data transmission device according to an embodiment of the present application, and as shown in fig. 2, the filtering module 108 further includes:
a first switch assembly 118, provided to the detection wire harness 110, for switching the on-off state between the detection wire harness 110 and the comparator 116;
the first end of the second switch assembly 120 is connected with the input end of the comparator 116, and the second end of the second switch assembly 120 is connected with the output end of the comparator 116 in parallel;
the controller 122 is connected to the detection wire harness 110, the first switch assembly 118, and the second switch assembly 120.
In this embodiment, the filtering module 108 includes a first switch assembly 118 and a second switch assembly 120, where the first switch assembly 118 is disposed on the detection wire harness 110, the detection wire harness 110 is connected to the comparator 116 when the first switch assembly 118 is closed, and the detection wire harness 110 is disconnected from the comparator 116 when the first switch assembly 118 is open.
The second switching device is connected in parallel with the comparator 116, and when the second switching device is turned off, the C-PHY signal in the transmission line bundle 102 is received by the signal processing module 106 after passing through the input positive electrode of the comparator 116 and passing through the output end of the comparator 116. When the second switching device is closed, the second switching device acts as a shorting of the second switching device, at which point the C-PHY signals in the transmission line bundle 102 are directly transferred to the signal processing module 106.
The first switching device and the second switching device are each controlled by a controller 122. Specifically, the controller 122 is connected to the detection harness 110 through an analog-to-digital converter (Analog to Digital Converter, ADC) capable of converting the first noise signal in the detection harness 110 into a digital signal, and the controller 122 acquires a signal value of the first noise signal based on the digital signal.
Specifically, if the controller 122 determines that the signal value of the first noise signal is greater than the preset first threshold, it indicates that there is more radiation interference in the current environment, and the generated noise signal is greater, at this time, the first switch component 118 is controlled to be closed, the second switch component 120 is controlled to be opened, and the C-PHY signal in the transmission harness 102 and the first noise signal are processed by the comparator 116, and then the filtered C-PHY signal is output.
If the controller 122 determines that the signal value of the first noise signal is less than the first threshold, it indicates that the radiation interference in the current environment is less, and the influence of the noise signal on the signal quality is less, at this time, the first switch component 118 may be controlled to be opened, and the second switch component 120 may be controlled to be closed, the C-PHY signal in the transmission harness 102 is directly transmitted to the signal processing module 106, at this time, the comparator 116 is not operated, and the power consumption of the data transmission device 100 can be reduced.
In some embodiments of the present application, as shown in fig. 1 and 2, the transmission harness 102 is a harness of the C-PHY standard;
the first transmission line bundle 102 includes a first wire core 1022, a second wire core 1024, and a third wire core 1026;
the comparator 116 includes:
the first comparator 1162, a first input end of the first comparator 1162 is connected with the first wire core 1022, and a second input end of the first comparator 1162 is connected with the detection wire harness 110;
the second comparator 1164, a first input end of the second comparator 1164 is connected with the second wire core 1024, and a second input end of the second comparator 1164 is connected with the detection wire harness 110;
the third comparator 1166, a first input of the third comparator 1166 is connected to the third core 1026, and a second input of the third comparator 1166 is connected to the detection harness 110.
In the present embodiment, the transmission harness 102 is a harness of the C-PHY standard, and specifically includes a first wire core 1022, a second wire core 1024, and a third wire core 1026. Specifically, the interface of the C-PHY standard is a display type peripheral communication standard interface for solving the problem of high-speed big data, and belongs to a standard interface of three mechanisms. The transmission harness 102 of the C-PHY standard employs a 3-wire design, i.e., three wire cores including the first wire core 1022, the second wire core 1024, and the third wire core 1026 described above.
Wherein the first, second and third cores 1022, 1024 and 1026 correspond to three phase signal paths A, B and C, respectively, for transmitting the three states high (VA), medium (VB) and low (VC), respectively.
The comparator 116 specifically includes a first comparator 1162, a second comparator 1164, and a third comparator 1166, which are respectively connected to the first core 1022, the second core 1024, and the third core 1026 of the transmission harness 102, so as to filter noise signals in the first core 1022, the second core 1024, and the third core 1026, respectively.
Specifically, the positive electrode of the input end of the first comparator 1162 is connected to the first wire core 1022, the negative electrode of the input end of the first comparator 1162 is connected to the detection wire harness 110, and the first comparator 1162 can filter the interfering second noise signal from the signal of the first wire core 1022 by subtracting the normal C-PHY (VA) signal from the first noise signal in the first wire core 1022.
Similarly, the positive electrode of the input end of the second comparator 1164 is connected with the second wire core 1024, the negative electrode of the input end of the second comparator 1164 is connected with the detection wire harness 110, and the second comparator 1164 can filter the interfering second noise signal in the signal of the second wire core 1024 by subtracting the normal C-PHY (VB) signal from the second noise signal in the second wire core 1024.
The positive electrode of the input end of the third comparator 1166 is connected to the third core 1026, the negative electrode of the input end of the third comparator 1166 is connected to the detection wire harness 110, and the third comparator 1166 can filter the interfering second noise signal from the signal of the third core 1026 by subtracting the normal C-PHY (VC) signal from the third noise signal in the third core 1026.
By respectively performing noise filtering on the three wire cores of the C-PHY wire harness, the C-PHY signal in the transmission wire harness 102 has better signal quality, and the reliability and the anti-interference capability of the data transmission device 100 are improved.
In some embodiments of the present application, as shown in fig. 2, the first switch assembly 118 includes:
a first switch 1182 disposed between the signal source 104 and the comparator 116;
the second switch 1184 is disposed between the first switch 1182 and the controller 122.
In this embodiment, the first switch assembly 118 specifically includes a first switch member 1182 and a second switch member 1184, where the first switch member 1182 is disposed on the detection wire harness 110, one end of the first switch member 1182 is connected to the signal source 104, the second end of the first switch member 1182 is connected to the comparator 116, when the first switch is closed, the signal source 104 is connected to the comparator 116, the input terminal negative electrode of the comparator 116 receives the first noise signal, when the first switch is opened, the signal source 104 is disconnected from the comparator 116, and the negative electrode of the comparator 116 does not receive the first noise signal.
The second switch member 1184 is also disposed on the detection wire harness 110 and connected to the controller 122, the first end of the second switch member is connected to the second end of the first switch member, the second end of the second switch member is connected to the second resistor 114, and when the second switch member is closed, the two ends of the detection wire harness 110 are respectively grounded through the resistor, wherein a noise signal can be generated under the action of the interference signal source 104 in the environment. If the second switch is open, the detection harness 110 fails to form a loop in which the second noise signal is no longer generated.
When the signal value of the second noise signal is smaller, the first switch 1182 and the second switch 1184 are turned off, and the filtering module 108 is not operated at this time, so that power consumption can be reduced.
In some embodiments of the present application, as shown in fig. 2, the second switch assembly 120 includes:
a third switch 1202 connected in parallel with the first comparator 1162;
a fourth switch 1204 in parallel with the second comparator 1164;
fifth switch 1206 is connected in parallel with third comparator 1166.
In the embodiment of the present application, the second switch assembly 120 specifically includes a third switch member 1202, a fourth switch member 1204, and a fifth switch member 1206, which are respectively connected in parallel to the first comparator 1162, the second comparator 1164, and the third comparator 1166.
When the signal value of the first noise signal is greater than the preset first threshold, the third switch 1202, the fourth switch 1204 and the fifth switch 1206 are controlled to be turned off, and the C-PHY signals in the first wire core 1022, the second wire core 1024 and the third wire core 1026 are processed by the first comparator 1162, the second comparator 1164 and the third comparator 1166 respectively, and then the filtered C-PHY signals are output.
If the signal value of the first noise signal is smaller than the first threshold, the third switch 1202, the fourth switch 1204 and the fifth switch 1206 are controlled to be closed, and the C-PHY signals in the first wire core 1022, the second wire core 1024 and the third wire core 1026 are all directly transmitted to the signal processing module 106, so that the three-way comparator 116 does not work, and the power consumption of the data transmission device 100 can be reduced.
In some embodiments of the present application, fig. 3 shows a third schematic structural diagram of a data transmission device according to an embodiment of the present application, and as shown in fig. 3, a detection harness 110 includes:
a fourth wire core 1102 connected to a second input of the first comparator 1162;
a fifth wire core 1104 connected to a second input of the second comparator 1164;
the sixth wire core 1106 is connected to the second input terminal of the third comparator 1166.
In the embodiment of the present application, the detection wire harness 110 may include a plurality of wire cores, that is, a fourth wire core 1102, a fifth wire core 1104, and a sixth wire core 1106, where the fourth wire core 1102 is disposed side by side with the first wire core 1022, and the fourth wire core 1102 and the first wire core 1022 are connected to the first comparator 1162. The fifth wire core 1104 is arranged side by side with the second wire core 1024, and both the fifth wire core 1104 and the second wire core 1024 are connected with the second comparator 1164. The sixth wire core 1106 is arranged side by side with the third wire, and the sixth wire core 1106 and the third wire core 1026 are connected to a third comparator 1166.
By providing a multi-channel detection harness 110 as differential signals for the C-PHY (VA), C-PHY (VB) and C-PHY (VC), respectively, the filtering effect is advantageously improved.
In some embodiments of the present application, fig. 4 shows a fourth schematic structural diagram of a data transmission device according to an embodiment of the present application, and as shown in fig. 4, the filtering module 108 includes: the first input end of the conjugate filter 124 is connected to the first transmission line bundle 102, the second input end of the conjugate filter 124 is connected to the detection line bundle 110, and the output end of the conjugate filter 124 is connected to the signal processing module 106 through the second transmission line bundle.
In the present embodiment, the filtering module 108 may be implemented by a conjugate filter 124. Specifically, for three-way cores, namely, a first core 1022 (VA) second core 1024 (VB) and a third core 1026 (VC), in the transmission harness 102 of the C-PHY, three-way conjugate filters 124 are respectively provided, and magnetic field cancellation is formed between the first core 1022 (VA) second core 1024 (VB), the third core 1026 (VC) and the detection harness 110, so that noise signals on the detection harness 110 are cancelled in the transmission harness 102.
The embodiment of the application performs noise elimination through the conjugate filter 124, and has simple circuit and high reliability.
In some embodiments of the present application, an electronic device is provided, fig. 5 shows a block diagram of a structure of the electronic device according to an embodiment of the present application, as shown in fig. 5, an electronic device 500 includes:
the data transmission device 100 according to any one of the foregoing embodiments, wherein the signal source is an image acquisition module 502 and the signal processing module is a processor 504.
In this embodiment, the first signal, i.e. the C-PHY signal, the image acquisition module 502 is connected to the processor 504 through the data transmission device 100, and the data transmission device 100 can send the clean, high-quality first signal to the processor 504, so that the processor 504 drives the display to display a corresponding image through the first signal.
The data transmission device 100 is provided with a detection wire harness and a filtering module, wherein the detection wire harness and the transmission wire harness are arranged side by side, noise signals in the transmission wire harness are filtered based on noise signals in the detection wire harness, noise interference in the data transmission device 100 can be accurately reduced, the anti-interference capability of the high-speed wire harness is improved, and the working reliability of the data transmission device 100 when the electronic equipment 500 is started with a strong radiation communication function is ensured.
In some embodiments of the present application, a filtering control method is provided for controlling the electronic device provided in the foregoing embodiments, where the data transmission device includes a first switch component and a second switch component, fig. 6 shows a flowchart of the filtering control method according to an embodiment of the present application, and as shown in fig. 6, the filtering control method includes:
step 602, acquiring a first noise signal in a detection wire harness;
step 604, according to the comparison result of the signal value of the first noise signal and the first threshold, controlling the first switch component and the second switch component to change the switch state, so as to perform filtering processing on the second noise signal in the first transmission line bundle.
In this embodiment of the present application, a filtering module and a detection wire harness are disposed in the data transmission device, the detection wire harness is equivalent to an additional wire harness disposed in the data transmission device, and the wire harness is not connected to the signal source and the signal processing module, that is, when no interference factors such as radiation or magnetic field exist in the environment, no signal exists in the detection wire harness.
After the first noise signal in the detection wire harness is detected, the fact that similar noise signals exist in the transmission wire harness can be determined, and therefore the second noise signal in the transmission wire harness can be effectively filtered based on the signal value of the first noise signal.
Specifically, the filtering module comprises a first switch assembly and a second switch assembly, wherein the first switch assembly is arranged on the detection wire harness, the detection wire harness is connected with the comparator when the first switch assembly is closed, and the detection wire harness is not connected with the comparator when the first switch assembly is opened.
The second switching device is connected with the comparator in parallel, and when the second switching device is disconnected, the C-PHY signal in the transmission wire harness is received by the signal processing module after passing through the input positive electrode of the comparator and the output end of the comparator. When the second switching device is closed, the second switching device is equivalent to shorting the second switching device, and at the moment, the C-PHY signal in the transmission harness is directly transmitted to the signal processing module.
Based on the signal value of the first noise signal and a comparison result of a preset first threshold value, whether the noise signal exists in the current transmission wire harness or not is judged, and when the noise signal exists, filtering processing is carried out on the noise signal, so that noise interference in the data transmission device can be accurately reduced, the anti-interference capability of the high-speed wire harness is improved, and the working reliability of the data transmission device when the electronic equipment starts a strong radiation communication function is ensured.
In some embodiments of the present application, controlling the first switch component and the second switch component to change the switch state according to a comparison result of the first noise signal and the first threshold value includes:
controlling the first switch component to be closed and controlling the second switch component to be opened under the condition that the signal value of the first noise signal is smaller than a first threshold value;
and under the condition that the signal value of the first noise signal is greater than or equal to a first threshold value, controlling the first switch component to be opened and controlling the second switch component to be closed.
In the embodiment of the application, if the controller determines that the signal value of the first noise signal is greater than the preset first threshold, it is indicated that the radiation interference in the current environment is more, the generated noise signal is greater, at this time, the first switch component is controlled to be closed, the second switch component is controlled to be opened, and after the C-PHY signal in the transmission harness and the first noise signal are processed by the comparator, the filtered C-PHY signal is output, so that the reliability of data transmission is improved.
If the controller determines that the signal value of the first noise signal is smaller than the first threshold, the radiation interference in the current environment is smaller, the influence of the noise signal on the signal quality is smaller, at the moment, the first switch assembly can be controlled to be opened, the second switch assembly can be controlled to be closed, the C-PHY signal in the transmission wire harness is directly transmitted to the signal processing module, at the moment, the comparator does not work, and the power consumption of the data transmission device can be reduced.
In some embodiments of the present application, after controlling the first switch assembly and the second switch assembly to change the switch state, the filter control method further includes:
eye diagram analysis is carried out on the first signals in the transmission wire harness so as to obtain signal quality allowance of the first signals;
displaying image information corresponding to the first signal when the signal quality allowance is greater than or equal to a second threshold;
in the case where the signal quality margin is smaller than the second threshold, the display of the image information is abandoned and the first threshold is lowered.
In the embodiment of the application, after the first signal is filtered or not filtered by controlling the first switch component and the second switch component to change the switch state based on the comparison result of the first noise signal and the first threshold value, eye diagram analysis is further performed on the first signal.
Specifically, the eye diagram refers to an image formed by overlapping each symbol waveform obtained by scanning together due to the afterglow effect of an oscilloscope. The eye diagram contains abundant information, and the actual influence of inter-code crosstalk and noise can be observed from the eye diagram, so that the signal quality degree can be estimated, namely the signal quality and the signal quality allowance of a signal can be judged.
And if the signal quality allowance of the first signal is larger than or equal to the second threshold value based on the eye diagram analysis, the quality of the first signal is good, and at the moment, the controller controls the display device to normally display the image corresponding to the first signal and keeps the current first threshold value unchanged.
If the eye diagram analysis determines that the signal quality allowance of the first signal is smaller than the second threshold, the signal quality of the first signal after current processing is poor, and the requirement cannot be met, displaying the image corresponding to the current first signal is abandoned, and the first threshold is properly lowered, for example, the first threshold is lowered from 1.0mV to 0.8mV, and the filtering range of the filtering module is enhanced.
According to the method and the device, the C-PHY signal eye diagram is identified through the controller side, the first threshold value of the intervention work of the self-adaptive adjustment filtering module can be ensured, the reliability of data transmission can be ensured, and the accuracy of image display can be ensured.
In some embodiments of the present application, a filtering control device is provided for controlling the electronic apparatus provided in the above embodiments, the data transmission device includes a first switch component and a second switch component, fig. 7 shows a block diagram of a structure of the filtering control device according to an embodiment of the present application, and as shown in fig. 7, the filtering control device 700 includes:
an acquisition module 702, configured to acquire a first noise signal in a detection harness;
and the control module 704 is configured to control the first switch component and the second switch component to change the switch states according to a comparison result of the signal value of the first noise signal and the first threshold value, so as to perform filtering processing on the second noise signal in the first transmission line bundle.
According to the method and the device, based on the comparison result of the signal value of the first noise signal and the preset first threshold value, whether the noise signal exists in the current transmission wire harness or not is judged, and when the noise signal exists, the noise signal is subjected to filtering processing, so that noise interference in the data transmission device can be accurately reduced, the anti-interference capability of the high-speed wire harness is improved, and the working reliability of the data transmission device when the electronic equipment starts the strong radiation communication function is ensured.
In some embodiments of the present application, the control module is further configured to:
controlling the first switch component to be closed and controlling the second switch component to be opened under the condition that the signal value of the first noise signal is smaller than a first threshold value;
and under the condition that the signal value of the first noise signal is greater than or equal to a first threshold value, controlling the first switch component to be opened and controlling the second switch component to be closed.
In the embodiment of the application, if the controller determines that the signal value of the first noise signal is greater than the preset first threshold, it is indicated that the radiation interference in the current environment is more, the generated noise signal is greater, at this time, the first switch component is controlled to be closed, the second switch component is controlled to be opened, and after the C-PHY signal in the transmission harness and the first noise signal are processed by the comparator, the filtered C-PHY signal is output, so that the reliability of data transmission is improved.
If the controller determines that the signal value of the first noise signal is smaller than the first threshold, the radiation interference in the current environment is smaller, the influence of the noise signal on the signal quality is smaller, at the moment, the first switch assembly can be controlled to be opened, the second switch assembly can be controlled to be closed, the C-PHY signal in the transmission wire harness is directly transmitted to the signal processing module, at the moment, the comparator does not work, and the power consumption of the data transmission device can be reduced.
In some embodiments of the present application, the filtering control device further includes:
the analysis module is used for carrying out eye diagram analysis on the first signal in the transmission line bundle so as to acquire the signal quality allowance of the first signal;
the display module is used for displaying the image information corresponding to the first signal under the condition that the signal quality allowance is larger than or equal to the second threshold value;
and the adjusting module is used for discarding the display of the image information and reducing the first threshold value under the condition that the signal quality allowance is smaller than the second threshold value.
According to the method and the device, the C-PHY signal eye diagram is identified through the controller side, the first threshold value of the intervention work of the self-adaptive adjustment filtering module can be ensured, the reliability of data transmission can be ensured, and the accuracy of image display can be ensured.
The embodiment of the application further provides a readable storage medium, on which a program or an instruction is stored, which when executed by a processor, implements each process of the above method embodiment, and can achieve the same technical effects, so that repetition is avoided, and no further description is given here.
The processor is a processor in the electronic device in the above embodiment. Readable storage media include computer readable storage media such as Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic or optical disks, and the like.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A data transmission apparatus, comprising:
the device comprises a signal source, a signal processing module, a filtering module, a first transmission wire harness, a second transmission wire harness, a detection wire harness and a first resistor; the signal source is connected with the first input end of the filtering module through the first transmission wire harness;
the signal source is connected with the second input end of the filtering module through the detection wire harness;
the output end of the filtering module is connected with the signal processing module through the second transmission wire harness;
the first end of the first resistor is connected with the first end of the detection wire harness, the second end of the first resistor is grounded, and the first resistor is a resistor simulating the signal source;
the filtering module performs filtering processing on the second noise signal in the first transmission wire harness according to the first noise signal in the detection wire harness.
2. The data transmission apparatus according to claim 1, further comprising:
and the first end of the second resistor is connected with the second end of the detection wire harness, and the second end of the second resistor is grounded.
3. The data transmission apparatus of claim 1, wherein the filtering module comprises:
the first input end of the comparator is the first input end of the filtering module, the second input end of the comparator is the second input end of the filtering module, and the output end of the comparator is the output end of the filtering module.
4. A data transmission device according to claim 3, wherein the filtering module further comprises:
the first switch assembly is arranged on the detection wire harness and used for switching the on-off state between the detection wire harness and the comparator;
the first end of the second switch component is connected with the input end of the comparator, and the second end of the second switch component is connected with the output end of the comparator in parallel;
and the controller is connected with the detection wire harness, the first switch assembly and the second switch assembly.
5. The data transmission device of claim 4, wherein the transmission harness is a harness of a C-PHY standard;
the first transmission wire harness comprises a first wire core, a second wire core and a third wire core;
the comparator includes:
the first input end of the first comparator is connected with the first wire core, and the second input end of the first comparator is connected with the detection wire bundle;
the first input end of the second comparator is connected with the second wire core, and the second input end of the second comparator is connected with the detection wire bundle;
and the first input end of the third comparator is connected with the third wire core, and the second input end of the third comparator is connected with the detection wire bundle.
6. The data transmission apparatus of claim 1, wherein the filtering module comprises:
the first input end of the conjugate filter is connected with the first transmission line bundle, the second input end of the conjugate filter is connected with the detection line bundle, and the output end of the conjugate filter is connected with the signal processing module through the second transmission line bundle.
7. An electronic device, comprising:
the data transmission device of any one of claims 1 to 6, wherein the signal source is an image acquisition module and the signal processing module is a processor.
8. A filter control method for controlling the electronic device according to claim 7, wherein the data transmission means includes a first switch assembly and a second switch assembly, the filter control method comprising:
acquiring a first noise signal in the detection wire harness;
and controlling the first switch assembly and the second switch assembly to change the switch state according to the comparison result of the signal value of the first noise signal and the first threshold value so as to carry out filtering processing on the second noise signal in the first transmission wire harness.
9. The filtering control method according to claim 8, wherein the controlling the first switch assembly and the second switch assembly to change the switch state according to the comparison result of the first noise signal and the first threshold value includes:
controlling the first switch assembly to be closed and controlling the second switch assembly to be opened under the condition that the signal value of the first noise signal is smaller than the first threshold value;
and under the condition that the signal value of the first noise signal is greater than or equal to the first threshold value, controlling the first switch assembly to be opened and controlling the second switch assembly to be closed.
10. A filter control device for controlling the electronic apparatus according to claim 7, wherein the data transmission device includes a first switch assembly and a second switch assembly, the filter control device comprising:
an acquisition module for acquiring a first noise signal in the detection harness;
and the control module is used for controlling the first switch assembly and the second switch assembly to change the switch state according to the comparison result of the signal value of the first noise signal and the first threshold value so as to carry out filtering processing on the second noise signal in the first transmission wire harness.
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